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For reaction aArarrxP , when [A] 2.2 m...

For reaction `aArarrxP` , when [A] 2.2 mM , the rate was found to be `2.4mM.s^(-1)` . On reducing concentration of A to half, the rate changes to `0.6mM.s^(-1)`. The order of reaction with respect to A is -

A

`1.5`

B

`2.0`

C

`2.5`

D

`3.0`

Text Solution

Verified by Experts

`aArarrxP`
`therefore` Rate of reaction = `k[A]^(a)` , order of reaction = a
`[A]_(1)=2.2mM,r_(1)=2.4"mM.s"^(-1)" "..[1]`
`[A]_(2)=(2.2)/(2)mM,r_(2)=0.6"mM.s"^(-1)" "..[2]`
On reducing the concentration of A to half, the rate of reaction is decreased by four times.
`therefore` Rate of reaction `=k[A]^(2), ` Order of reaction = 2
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